X
Gemstone Search

Your Details

Please fill in your email address

Please fill in a password

Forgot your password?

Natural Untreated Gemstones

Discover genuine untreated gemstones selected for natural beauty, rarity, and authenticity.

Natural Untreated Gemstones Weight
Natural Untreated Gemstones Size
Natural Untreated Gemstones Clarity
Natural Untreated Gemstones Price
Natural Untreated Gemstones Treatment

Size Explained

Choose Size or Size Range
For Example: 6-7
For Example: 8-9
Bi-color Natural Untreated Gemstones
Black Natural Untreated Gemstones
Blue Natural Untreated Gemstones
Brown Natural Untreated Gemstones
Golden Natural Untreated Gemstones
Gray Natural Untreated Gemstones
Green Natural Untreated Gemstones
Multicolor Natural Untreated Gemstones
Orange Natural Untreated Gemstones
Pink Natural Untreated Gemstones
Purple Natural Untreated Gemstones
Red Natural Untreated Gemstones
Turquoise Natural Untreated Gemstones
Violet Natural Untreated Gemstones
White Natural Untreated Gemstones
Yellow Natural Untreated Gemstones
Single
Pairs
Lots
Faceted
Cabochons
Clear All
0.16Ctw J Diamond, Round, Vvs-Vs

0.16Ctw J Diamond, Round, Vvs-Vs

2.8 mm (calibrated)

$ 313.30

View Details
0.08Ct Cool Green Alexandrite, Oval, Vvs-Vs

0.08Ct Cool Green Alexandrite, Oval, Vvs-Vs

3 x 2 mm (calibrated)

$ 56.00

View Details
1.08Ct Medium Purple Spinel, Cushion, Vvs

1.08Ct Medium Purple Spinel, Cushion, Vvs

6.7 x 5.6 mm

$ 71.28

View Details
1.20Ct Dark Purple Spinel, Cushion, Vs

1.20Ct Dark Purple Spinel, Cushion, Vs

6.3 x 5.4 mm

$ 172.80

View Details
2.48Ct Medium Pink Morganite, Pear Shape, Vvs-Vs

2.48Ct Medium Pink Morganite, Pear Shape, Vvs-Vs

13.1 x 7.1 mm

$ 124.00

View Details
0.89Ct Light Golden Morganite, Pear Shape, Vvs-Vs

0.89Ct Light Golden Morganite, Pear Shape, Vvs-Vs

7.6 x 5.8 mm

$ 64.62

View Details
1.23Ct Dark Purple Spinel, Oval, Vs

1.23Ct Dark Purple Spinel, Oval, Vs

6.3 x 5.6 mm

$ 180.42

View Details
1.21Ct Light Brown Diamond, Emerald Cut, Si
Diamond Product Video (700077)

1.21Ct Light Brown Diamond, Emerald Cut, Si

5.6 x 5.2 mm

$ 2,903.18

View Details
0.18Ctw I Diamond, Round, Vvs-Vs

0.18Ctw I Diamond, Round, Vvs-Vs

2.8 mm (calibrated)

$ 394.02

View Details
0.69Ct Medium Pink Morganite, Pear Shape, Vvs-Vs

0.69Ct Medium Pink Morganite, Pear Shape, Vvs-Vs

8.6 x 4.5 mm

$ 72.86

View Details
3.24Ct Very Light Golden-Brown Rutile Topaz, Cushion, Transparent

3.24Ct Very Light Golden-Brown Rutile Topaz, Cushion, Transparent

10.8 x 7.1 mm

$ 81.00

View Details
7.10Ct Coral Pink Morganite, Pear Shape, Transparent

7.10Ct Coral Pink Morganite, Pear Shape, Transparent

18.2 x 11.7 mm

$ 98.32

View Details
1.96Ctw Multicolor Andalusite, Round, Vs

1.96Ctw Multicolor Andalusite, Round, Vs

3.8 mm

$ 129.36

View Details
3.81Ctw White Topaz, Square, Vvs-Vs

3.81Ctw White Topaz, Square, Vvs-Vs

4 x 4 mm (calibrated)

$ 36.96

View Details
1.13Ct Deep Purple Spinel, Cushion, Vvs-Vs

1.13Ct Deep Purple Spinel, Cushion, Vvs-Vs

6.4 x 5.6 mm

$ 135.60

View Details
0.12Ctw H Diamond, Marquise, Vvs
Diamond Product Video (740699)

0.12Ctw H Diamond, Marquise, Vvs

4 x 2 mm (calibrated)

$ 502.50

View Details
0.86Ct Light Golden Morganite, Pear Shape, Vs

0.86Ct Light Golden Morganite, Pear Shape, Vs

8 x 6 mm (calibrated)

$ 45.41

View Details
7.68Ct Light Rose Pink Morganite, Pear Shape, Translucent

7.68Ct Light Rose Pink Morganite, Pear Shape, Translucent

19.1 x 10 mm

$ 101.38

View Details
1.12Ct Reddish Purple Spinel, Cushion, Vvs-Vs
Spinel Product Video (742832)

1.12Ct Reddish Purple Spinel, Cushion, Vvs-Vs

6.1 x 5.6 mm

$ 224.00

View Details
11.84Ctw White Topaz, Oval, Vvs-Vs

11.84Ctw White Topaz, Oval, Vvs-Vs

12 x 10 mm (calibrated)

$ 94.72

View Details
0.90Ct Light Golden Morganite, Cushion, Vs

0.90Ct Light Golden Morganite, Cushion, Vs

6 x 6 mm (calibrated)

$ 65.34

View Details
1.23Ct Light Golden Morganite, Oval, Vvs-Vs

1.23Ct Light Golden Morganite, Oval, Vvs-Vs

8 x 6 mm (calibrated)

$ 64.94

View Details
0.09Ctw Black Diamond, Round, Opaque

0.09Ctw Black Diamond, Round, Opaque

2.1 mm (calibrated)

$ 86.40

View Details
0.93Ct Intense Mauve Spinel, Oval, Vs

0.93Ct Intense Mauve Spinel, Oval, Vs

6.6 x 5 mm

$ 104.57

View Details
1 2 3
...
85
Choose Page
1 - 186

Why Buy Natural Untreated Gemstones from GemSelect?

Why Choose Untreated Gemstones?

Untreated gemstones are valued for their natural color and clarity without artificial enhancement. Many buyers prefer these gems for authenticity, rarity, and long-term value.

Natural Loose Untreated Gems Online

Shop loose untreated gemstones online at GemSelect with confidence. Browse sapphires, rubies, spinels, aquamarine, garnet, tourmaline, and more with full disclosure.

Natural Untreated Gemstones for Jewelry and Collecting

Untreated Gemstones for Jewelry

Natural untreated gems are excellent for rings, earrings, pendants, and custom jewelry. Their original beauty makes every piece unique and meaningful.

Popular Untreated Gemstone Types

Popular choices include untreated sapphire, ruby, spinel, garnet, tourmaline, zircon, aquamarine, and many collector stones in a wide range of colors.

Certified Natural Gemstones

Many buyers choose untreated gemstones with gemological reports for added confidence. Certification can confirm identity and indicate whether treatments are present.

Collector Quality Untreated Gems

Collectors appreciate untreated gemstones because naturally fine examples are rarer than treated material. These stones can be especially desirable when color and clarity are strong.

Calibrated Untreated Gemstones

We also offer calibrated untreated gemstones in popular sizes suitable for standard jewelry settings, making custom designs easier and faster.

Worldwide Shipping from GemSelect

GemSelect offers secure online ordering, detailed product images, and worldwide delivery so you can shop untreated gemstones from anywhere.

Learn more about gemstone treatments, identification, and care on our Gemstone Information Pages.

FAQs

What does untreated gemstone mean?

An untreated gemstone has not undergone enhancement processes such as heating, dyeing, filling, coating, or diffusion to improve appearance.

Are untreated gemstones more valuable?

Often yes, especially in sapphire, ruby, and other premium gems where fine untreated stones are rarer than treated examples.

How can I verify a gemstone is untreated?

Independent laboratory certification is the best way to verify whether a gemstone is natural and untreated.

Which gemstones are commonly sold untreated?

Spinel, garnet, zircon, tourmaline, aquamarine, and some sapphires or rubies are often available untreated depending on source and quality.

Are all untreated gemstones natural?

Natural untreated gemstones are mined stones that have not been enhanced after cutting. Always buy from trusted sellers with clear disclosure.

GemSelect Certified Store Reviews

GemSelect: Over 22 Years in the Gemstone Business! Thank you for trusting us with your purchase!

Overall Rating -> 10 star ratings

Great site for finding specific stones and sizes for individual pieces of jewelry

Posted By Designer in December, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

It was great!

Posted By Annie in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I could see the actual gem I was buying

Posted By Bugs in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Took a chance on purchasing my gemstones from Gemselect and was impressed. 10/10

Posted By KT in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

easy site to navigate

Posted By Curt's Cabochons in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I was able to find what I wanted very easily!

Posted By Lenny in January, 2026
Source: Bizrate
→ View All GemSelect Reviews on Bizrate
Enlarged Gemstone Image